Review Article*: The Ecology of Chigger-Borne Rickettsiosis (Scrub Typhus)1, 2

Traub, Robert; Wisseman, Charles L.

doi:10.1093/jmedent/11.3.237

Cited by 219 publications

(128 citation statements)

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“…Some previous studies showed that the critical temperature for the development and reproduction of L. deliense was 13 and 35°C, respectively, and the optimum temperature was 18–28°C [23,35]. The optimum temperatures were 23–25°C for larval activities and 18–30°C for disease transmission.…”

Section: Life Cyclementioning

confidence: 99%

“…The remaining morphological characteristics include AP (24–33 μm) ≤SB (26–36 μm), ASB (24–31 μm) ≈2PSB (11–16 μm), fDS=2.8.6.6.4.2=28 and VS=20–22 [12,14]. Table 1 lists the abbreviations and the corresponding morphological structure of the larva of Leptotrombidium deliense [9,12,14,23]. Two photos of the larva, including the whole mite and its scutum, are shown in Figs.…”

Section: Taxonomy Morphology and Identificationmentioning

confidence: 99%

“…After 2–3 days sucking, the “newborn larva” enlarges dozens of times in size and becomes an “engorged larva”, which then falls off the host onto the ground and develops into a nymphochrysalis, nymph, imagochrysalis and adult (male and female). The females produce their eggs in crevices of top soil and usually produce 100–200 eggs in their life time [12,23,33]. The lifespan of L. deliense is about 15–81 days (mean 44 days) for males and 75–107 days (average 91 days) for females [34].…”

Section: Life Cyclementioning

confidence: 99%

“…The temperature has proven to be a key factor affecting the life cycle development of L. deliense [12,23,33,35]. Some previous studies showed that the critical temperature for the development and reproduction of L. deliense was 13 and 35°C, respectively, and the optimum temperature was 18–28°C [23,35].…”

Section: Life Cyclementioning

confidence: 99%

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Research Progress on Leptotrombidium deliense

Guo

Jin

2018

Korean J Parasitol

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This article reviews Leptotrombidium deliense, including its discovery and nomenclature, morphological features and identification, life cycle, ecology, relationship with diseases, chromosomes and artificial cultivation. The first record of L. deliense was early in 1922 by Walch. Under the genus Leptotrombidium, there are many sibling species similar to L. deliense, which makes it difficult to differentiate L. deliense from another sibling chigger mites, for example, L. rubellum. The life cycle of the mite (L. deliense) includes 7 stages: egg, deutovum (or prelarva), larva, nymphochrysalis, nymph, imagochrysalis and adult. The mite has a wide geographical distribution with low host specificity, and it often appears in different regions and habitats and on many species of hosts. As a vector species of chigger mite, L. deliense is of great importance in transmitting scrub typhus (tsutsugamushi disease) in many parts of the world, especially in tropical regions of Southeast Asia. The seasonal fluctuation of the mite population varies in different geographical regions. The mite has been successfully cultured in the laboratory, facilitating research on its chromosomes, biochemistry and molecular biology.

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Section: Life Cyclementioning

confidence: 99%

Section: Taxonomy Morphology and Identificationmentioning

confidence: 99%

Section: Life Cyclementioning

confidence: 99%

Section: Life Cyclementioning

confidence: 99%

See 2 more Smart Citations

Research Progress on Leptotrombidium deliense

Guo

Jin

2018

Korean J Parasitol

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“…The area of Southeast Asia has been proposed as the epicentre of scrub typhus where the largest number of Rickettsia tsutsugamushi serotypes would exist (Traub and Wisseman, 1974). Studies performed in this area have revealed that Karp and Karp-related (TA686, TA716, TA763) strains are the most prevalent (Elisberg et ai, 1967;Shirai et al, 1978;Shirai et al, 1979;Shirai et al, 1980;Shirai et al, 1981).…”

Section: Introductionmentioning

confidence: 99%

SEROLOGICAL ANALYSIS OF RICKETTSIA TSUTSUGAMUSHI ISOLATES FROM NORTH QUEENSLAND*

Shirai

Campbell

Gan

et al. 1982

Aust J Exp Biol Med

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Summary. Fifty-two Rickettsia tsutsuganwshi isolates from humans, rodents and chiggers in North Queensland were serologically characterized by the direct immunofluorescence test. A majority (71%) of the isolates was a mixture of two or more strains. The most frequently detected strains in the 52 isolates were TA716 (94%), TA763 (42%), TA686 (33%), and Karp (31%). The Gilliam strain was detected in only 4% of the isolates.

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Orientia

Walker

2015

Bergey's Manual of Systematics of Archaea and Bacteria

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O' ri.en' ti.a . M.L. fem. n. Orientia pertaining to the Orient, the area where the organisms are widely distributed. Proteobacteria / Alphaproteobacteria / Rickettsiales / Rickettsiaceae / Orientia Short rods 0.5–0.8 × 1.2–3.0 µm. Obligately intracellular . Grow free in the cytosol of the host cell ; rarely invade the nucleus. Bacterial cells are released surrounded by host cell membrane. Cell walls lack lipopolysaccharide and peptidoglycan . The outer leaflet of the cell wall is considerably thicker than the inner leaflet, unlike the wall of rickettsiae. The genome of Orientia is 1.1–1.5 × 10 9 Da, larger than that of Rickettsia . Maintained by transovarian transmission in its various trombiculid mite hosts . Etiological agents of scrub typhus in humans . Transmitted to humans by mite larvae. Found in Asia and Australia. The mol % G + C of the DNA is : 28.1–30.5 (HPLC). Type species : Orientia tsutsugamushi (Hayashi 1920) Tamura, Ohashi, Urakami and Miyamura 1995, 590 ( Rickettsia tsutsugamushi (Hayashi 1920) Ogata 1931, 252; “ Theileria tsutsugamushi ” Hayashi 1920, 63.)

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Review Article*: The Ecology of Chigger-Borne Rickettsiosis (Scrub Typhus)1, 2

Cited by 219 publications

References 0 publications

Research Progress on Leptotrombidium deliense

Research Progress on Leptotrombidium deliense

SEROLOGICAL ANALYSIS OF RICKETTSIA TSUTSUGAMUSHI ISOLATES FROM NORTH QUEENSLAND*

Orientia

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